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# Questions

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### Limitations on model-categorical presentations

may 7 12 at 22:52 Mike Shulman 17.2k2070

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### Internal categories in simplicial sets

dec 25 at 7:59 Jeremy Hahn 43628

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### How many proofs that $\pi_n(S^n)=\mathbb{Z}$ are there?

feb 15 at 21:36 Chris Gerig 5,52611240

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### What does an etale topos classify?

dec 9 10 at 4:50 Harry Gindi 8,87823396

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### Loop space of a category

dec 6 at 7:16 Fedotov 36316

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869
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### Topological vs pro fundamental groups

feb 9 11 at 16:56 Jeremy Brazas 1,5161512

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### When is a reflective subcategory of a topos a topos?

dec 13 11 at 1:23 David Carchedi 7,7471027

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### Recognizing classifying toposes

dec 21 11 at 19:07 Mike Shulman 17.2k2070

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### Do strict pro-sets embed in locales?

feb 3 11 at 6:26 Dmitri Pavlov 7,08811344

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